Wall unit for a shower stall



FIG. 1 is a front perspective view of a wall unit for a shower stall showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a cross sectional view taken on line 3--3 of FIG. 2;

FIG. 4 is a cross sectional view taken on line 4--4 of FIG. 2;

FIG. 5 is a cross sectional view taken on line 5--5 of FIG. 2; and

FIG. 6 is a cross sectional view taken on line 6--6 of FIG. 4. 

The ornamental design for a wall unit for a shower stall, as shown. 